Support OPTIONS originating from CORS http request

remotivelabs · Jan 16, 2025 · 2dee6bc · 2dee6bc
1 parent 35486bd
commit 2dee6bc
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/lib/grpc/server.ex b/lib/grpc/server.ex
@@ -166,6 +166,11 @@ defmodule GRPC.Server do
           )
         end
 
+        # this handles preflight, relevant for COORS
+        def __call_rpc__(unquote(path), :options, stream) do
+          {:ok, stream}
+        end
+
         if http_transcode and Map.has_key?(options, :http) do
           %{value: http_rule} = GRPC.Service.rpc_options(rpc, :http)
           {http_method, http_path, _matches} = Router.build_route(http_rule)